/**
 * Copyright (C) 2012 Eduard Sedov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.es.function;

/**
 * This is an interface for a function object, that can be registered and found 
 * by a {@link FunctionRegistry}.
 * 
 * @author ESEDO
 */
public interface Function<T> {

    /**
     * Main method of a function object. 
     * Assumes the parameter, calculates the return value and give it back.
     * 
     * @param params the parameter values of this function
     * @return the value calculated by this function
     * @throws FunctionException if occurs
     */
    public T invoke(Object... params) throws FunctionException;
}
